HP XP External Storage Software - Manual (Page 143)

the local array and external array. In this case, if an error occurs in the only set path, none of the
volumes in the external array can be used.
NOTE:
In the configuration in Figure 65 , HP recommends setting alternate paths to prevent the NAS Blade system
from being blocked because of the path failure. For more information, see Alternate paths .
The situation in Figure 65 is as follows:
• None of the user LUs can be used from node 1 or node 2.
• Clients cannot access volumes.
• The local array recognizes that the status of all file systems and volumes are blocked.
Figure 65 If both nodes use the same external array
1. Restore (for example, check the cable's connection status or change the switch) the status of the
error path between the local array and external array 1.
2. Execute the Check Paths & Restore Vol. command using External Storage XP. For instructions, see
Checking the connection status and resuming external LU operations (Check Paths & Restore
Vol.)
.
3. Perform the forced stop operations using NAS Blade Manager for resource group 1 and resource
group 2.
4. Stop the cluster using NAS Blade Manager.
5. Restart NAS OS 1 and NAS OS 2 (NAS channel adapter's OS) using LUN Manager or NAS
Blade Manager.
External Storage XP user guide for the XP12000, XP10000, SVS200 143